Unformatted text preview: wireless channel. s [ n ] consists of a sequence of bits. At any OFDM symbol time T s , the sequence of bits is mapped as N frequencydomain symbols { X , X 1 ,…, X N2 , X N1 } as shown in Figure 2. OFDM Transmitter Figure 2. The baseband modulation used for each of the N symbols could be different; as an example, 4QAM has been used for each symbol in Figure 2. The N frequencydomain symbols { X , X 1 ,…, X N2 , X N1 } are then passed through the FFT1 block to get N timedomain symbols...
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 Spring '09
 Prof
 ofdm transmitter, OFDM Transmitter Figure

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